Type of Governors :
Centrifugal Governors
Dead Weight Type
Loaded type
Spring Controlled Governor
More About Governors - http://enggexpert.blogspot.in/search?q=governor&x=0&y=0
The function of a governor is to regulate the mean speed of an engine, under the variations in load. Governor as the name indicates “Govern”, “regulate” and “control”.
Basic view of a Governor.
When the load on an engine increases, the speed of an engine decreases and therefore engine would need more working fluid. So then governor supplies the amount of working fluid needed.
When the load on an engine decreases, the speed of an engine increases and then the amount of fluid supply is cut-off so as to maintain mean speed of an engine.
A centrifugal governor is a specific type of governor that controls the speed of an engine by regulating the amount of fuel (or working fluid) admitted, so as to maintain a near constant speed whatever the load or fuel supply conditions. It uses the principle of proportional control.
When the load on an engine increases, speed decreases then the working fluid supply increases. And vice versa when the load on an engine decreases.
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